Fuse support



-v -s. R. SMITH, JR 2,170,698

FUSE SUPPORT Filed Jan. 11, 1939 F igJ.

2/ 5 I, 26 ,13 29 'INSUL-ATION Inventor: Sidney R1 Smith,JTt, by w HisAttorney.

Patented Aug. 22, 1939 2,170,698

UNITED STATES PATENT OFFICE 2,170,698 FUSE sorroa'r Sidney R. Smith,Jr., Pittsfield, Mass., assignor to General Electric Company, acorporation of New York Application January 11, 1939, Serial No. 250,3723 Claims. (Cl. 200133) The present invention relates to supports formanner as to leave an end free for connection electric fuses and has foran object the provision purposes. of an insulating support particularlyadapted for, The body of the fuse support comprises a but notnecessarily limited to, the mounting of porcelain insulator l4 suitablyformed to pre- 5 fuses such as are commonly employed for proventelectric creepage thereacross. Mounted re- 5 tection of transformersfrom secondary faults, spectively on opposite ends of this insulator areisolation of service entrance faults, banking of terminal elements ofsimple and identical contransformer secondaries and similar purposes.struction, which is of advantage from the stand- In cases where it isdesired to install secondary point of manufacturing cost. Each of theseterm fuses in the simplest and most economical manminal elementsincludes a screw-threaded split ner, it is a practice frequentlyemployed in the connector stud l5 which is secured to the correart toinsert a'secondary fuse directly between sponding end of insulator I inany suitable and in series with two line conductors or transmanner, asfor example, by cementing the inner former leads without employing anymechanical end of the stud in a recess in the end of the support, otherthan the conductors or leads insulator as indicated at it. The outer endof i5 themselves, for the fuse. Usually this proves the stud has atransverse slot 11, as best shown entirely satisfactory. However, insome installain Fig. 2, for reception of a conductor, and is tions ithas been found that vibration of the provided with a contact clip l8 andnut IQ for supporting conductors or leads, due to various clamping aconductor in the slot. The split concauses, may impose such strains onthe fuse as nector stud at one end of insulator It is clamped 20 toimpair its efiiciency and reliability of operato the bared portion I3 ofline conductor H for tion. Under such conditions it is desirable tosuspension mounting of the fuse support, and provide for the fuse aseparate support to relieve the free end of line conductor 12 is joinedto the the fuse itself of objectionable strain, but such split connectorstud at the other end of insu- 26 separate supports as heretoforeproposed have later It. v 5 not been entirely satisfactory due tocomplica- Each of the terminals includes also a metallic tions inconstruction or installation or to undecap 20 secured by welding orother suitable means sirably large increase in cost of the fuseinstallato stud i 5 and arranged to fit over the correu spending end ofinsulator I4. Each of these caps 80 It is therefore one of the morespecific objects has an arm 2| formed integrally therewith and of thepresent invention to provide an improved arranged to project laterallyto one side of infuse support for mounting on a line conductor orsulator I l. The free ends of these arms are other part of an overheadsecondary construcdisposed in spaced relationship and provided tion,which support lends itself to quick and with quick detachable screwclamps 22 for con- '6 ready installation and is of extremely low cost,nection with opposite ends of a fuse device sup- :5

simple and rugged design. ported and electrically connected between theOther objects and the details of that which I arms. consider to be noveland my invention will be- The fuse support of my present invention iscome apparent from the following description suitable for the mountingof several forms of do and the claims appended thereto taken in confusedevices. However, for purposes of example, junction with theaccompanying drawing in I have illustrated a fuse of a form disclosed inwhich Fig. 1 illustrates an exemplary fuse inmy previous applicationSerial No. 173,761, filed stallation embodying a support constructed inNovember 10, 1937, and assigned to the assignee accordance with myinvention, and Fig. 2 is an of the present invention. This fusecomprises an exploded view showing the construction and arinsulatingfuse tube 23 having therein a fuse 45 rangement of certain of the partsof the support link, including a fusible element 24 and a strain ofFig. 1. wire 25, with flexible cable extensions 26 of the In theexemplary installation shown on the fuse link extending respectivelyfrom opposite drawing, the fuse support is employed in conends of thetube 23 through sealing washers 21 junction with a common type of straininsulator, and 28 and closure caps 29. The illustrated fuse, 50designated III, which serves mechanically to join, or any other suitableform of fuse employed, may in a well known manner, two line conductorsll be readily connected between arms 2| by atand I2. Conductor II isbared at H for attachment of the fuse link cable extensions or tachment'of the fuse support thereto, while conother fuse terminal means tothes'crew clamps Bl ductor I2 is attached to insulator I. in such 22. Ifdesired, the arms 2| may be fixed so as 5 normally to impose tension onthe fuse link. The replacement 01' a blown fuse between arms 2| may beeffected easily when the fuse support is mounted on a line conductor inthe manner shown; or, for greater convenience and safety, the insulatingsupport may be quickly detached from both the line conductors forrefusing.

From the foregoing it will be seen that l. have provided an improvedfuse support which may be employed practically and economically forsuspension mounting of a fuse device on a line conductor or the like andwhich entirely relieves such fuse device from any strains resulting fromvibration of the supporting conductors or any other cause. It iscontemplated that modifications in the form and dimensions of the fusesupport illustrated may be required to accommodate it for variousinstallations and various sizes and ratings of fuses to be supportedthereby. It is intended however that such modifications as do not departfrom the true spirit of the present invention shall come within thescope of the appended claims.

What I claim as new anddesire to secure by Letters Patent of the UnitedStates is:

1. A fuse support adapted for suspension mounting on a line conductor orlike supporting means, comprising an elongated insulator, a terminalelement aflixed to one end of said insulator and having means for quickdetachable clamping attachment to a supporting conductor, a secondterminal element afiixed to the other end of the insulator and havingmeans for quick detachable clamping attachment to a second conductor, apair of conducting arms conductively associated respectively with saidterminal elements and projecting laterally from said insulator in spacedrelationship, and clamps carried by the free ends of said arms for quickdetachable connection respectively'with terminals of a fuse device tosupport such fuse device between said arms.

2. A fuse support adapted for suspension mounting on a line conductor orlike supporting means, comprising an elongated insulator, a pair ofthreaded connector studs respectively amxed to and projecting axiallyfrom the opposite ends of said insulator, each of said studs having atransverse slot for reception of a conductor and cooperative means forclamping a conductor in said, slot, a pair of arms mechanically andconductively associated respectively with said studs and projectinglaterally from said insulator in spaced relationship, and clamps carriedrespectively by the free ends of said arms for quick detachableconnection respectively with terminals of a fuse to support such fusebetween said arms.

3. A fuse support comprising an elongated insulator, a pair of threadedconnector studs respectively aflixed to and projecting axially from theopposite ends of said insulator, each of said studs having a transverseconductor receiving slot anda cooperating clamping nut for clamping aconductor in the slot, a pair of metal caps mechanically andelectrically associated respectively with said studs and fittingrespectively over the ends of said insulator, each of said caps havingan integrally formed arm projecting laterally to one side of theinsulator in such manner that the arms are in spaced relationship, andclamps carried by said arms for quick detachable connection respectivelywith terminals of a fuse to support such fuse between said arms.

' SIDNEY R. SMITH, JR.

